[MacPorts] #26488: ghc depends on perl 5.8 and perl 5.8 conflicts with perl 5.12

[MacPorts]

#26488: ghc depends on perl 5.8 and perl 5.8 conflicts with perl 5.12
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 Reporter:  takano32@…          |       Owner:  gwright@…           
     Type:  defect              |      Status:  assigned            
 Priority:  Normal              |   Milestone:                      
Component:  ports               |     Version:  1.9.1               
 Keywords:                      |        Port:  ghc ghc-devel       
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Comment(by dluke@…):

 I think we could handle this like we do for most things.

 Have perl5 be "the single perl5 port" that everything normally works with
 (and update it to 5.12.x). If ghc (or anything else) needs older perl, new
 ports just for those old versions can be created (or kept, in this case).
 If something needs older perl and a bunch of perl modules for that older
 perl, a port (or ports) for those modules would need to be created as
 well.

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Ticket URL: <https://trac.macports.org/ticket/26488#comment:8>
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